(Reuters) - The Obama administration is leaving open the possibility of giving Moscow certain secret data on U.S. interceptor missiles due to help protect Europe from any Iranian missile strike. A deal is being sought by Washington that could include classified data exchange because it is in the U.S. interest to enlist Russia and its radar stations in the missile-defense effort, a Pentagon spokeswoman said Tuesday in written replies to Reuters. No decision has been made yet on whether the United States would offer data about the interceptors' "velocity at burnout," or VBO, said Air Force Lieutenant Colonel April Cunningham,...